<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list clear">
					<div class="warp">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list clear">
					<div class="warp" v-for="item of hotCities" :key="item.id" @click="handleCityClick(item.name)">
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list" v-for="innerItem of item" :key="innerItem.id">
					<div class="item border-bottom" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
	import BScroll from "better-scroll"
	import { mapState, mapMutations } from 'vuex'
	export default {
		name: 'CityList',
		props: {
			cities: Object,
			hotCities: Array,
			letter: String
		},
		computed: {
			...mapState({
				currentCity: 'city'
			})			
		},
		methods: {
			handleCityClick: function(city){
				this.changeCity(city)
				this.$router.push('/')
			},
			...mapMutations({
				changeCity: 'changeCity'
			})
		},
		mounted: function(){
			this.$nextTick(function(){
				this.scroll = new BScroll(this.$refs.wrapper, {
					click: true
				})
			})
		},
		watch: {
			letter: function(){
				if(this.letter){
					const element = this.$refs[this.letter][0]
					this.scroll.scrollToElement(element)
				}
			}
		}
	}
</script>

<style lang="stylus" scoped>
	@import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color: #ccc
		&:after
			border-color: #ccc
	.border-bottom
		&:before
			border-color: #ccc
	.list
		overflow: hidden
		position: absolute
		top: 1.58rem
		left: 0
		bottom: 0
		right: 0
		.title
			height: .6rem
			line-height: .6rem
			background: #eee
			padding-left: .2rem
			color: #666
			font-size: .26rem
		.button-list
			padding: .2rem .6rem .2rem .2rem
			.warp
				float: left
				width: 33.33%	
				.button
					border: .02rem solid #ccc
					border-radius: .06rem			
					padding: .1rem 0
					margin: .1rem
					text-align: center
		.item-list
			.item
				height: .76rem
				line-height: .76rem
				padding-left: .2rem		
</style>